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Oracle Java Enterprise Edition 5 Web Component Developer Certified Professional Sample Questions:

1. For manageability purposes, you have been told to add a "count" instance variable to a critical JSP Document so that a JMX MBean can track how frequent this JSP is being invoked. Which JSP code snippet must you use to declare this instance variable in the JSP Document?

A) <jsp:declaration.instance> int count = 0; <jsp:declaration.instance>
B) <%! int count = 0; %>
C) <jsp:scriptlet.declaration> int count = 0; <jsp:scriptlet.declaration>
D) <jsp:declaration> int count = 0; <jsp:declaration>

2. A developer has created a special servlet that is responsible for generating XML content that is sent to a data warehousing subsystem. This subsystem uses HTTP to request these large data files, which are compressed by the servlet to save internal network bandwidth. The developer has received a request from management to create several more of these data warehousing servlets. The developer is about to copy and paste the compression code into each new servlet. Which design pattern can consolidate this compression code to be used by all of the data warehousing servlets?

A) Composite Facade
B) View Helper
C) Transfer Object
D) Intercepting Filter
E) Facade

3. Assume a JavaBean com.example.GradedTestBean exists and has two attributes. The attribute name is of type java.lang.String and the attribute score is of type java.lang.Integer.
An array of com.example.GradedTestBean objects is exposed to the page in a requestscoped attribute called results. Additionally, an empty java.util.HashMap called resultMap is placed in the page scope.
A JSP page needs to add the first entry in results to resultMap, storing the name attribute of the bean as the key and the score attribute of the bean as the value.
Which code snippet of JSTL code satisfies this requirement?

A) <c:set target="${resultMap}" property="${results[0].name}"
value="${results[0].score}" />
B) ${resultMap[results[0].name] = results[0].score}
C) <c:set var="${resultMap}" key="${results[0].name}"
value="${results[0].score}" />
D) <c:set var="resultMap" property="${results[0].name}"
value="${results[0].score}" />
E) <c:set var="resultMap" property="${results[0].name}">
${results[0].value}
</c:set>

4. You want to create a filter for your web application and your filter will implement javax.servlet.Filter.
Which two statements are true? (Choose two.)

A) Your filter class must implement a doFilter method that takes, among other things, an HTTPServletRequest object and an HTTPServletResponse object.
B) The method that your filter invokes on the object it received that implements javax.servlet.FilterChain can invoke either another filter or a servlet.
C) When your filter chains to the next filter, it should pass the same arguments it received in its doFilter method.
D) Your filter class must also implement javax.servlet.FilterChain.
E) Your filter class must implement an init method and a destroy method.

5. Your web page includes a Java SE v1.5 applet with the following declaration:
11.
<object classid='clsid:CAFEEFAC-0015-0000-0000-ABCDEFFEDCBA'
12.
width='200' height='200'>
13.
<param name='code' value='Applet.class' />
14.
</object>
Which HTTP method is used to retrieve the applet code?

A) RETRIEVE
B) POST
C) GET
D) PUT

Solutions: